Open Radar

 
Summary: When using Migration Assistant on macOS 10.13.0 Supplemental Update, an account migrated from a Mac OS X 10.6 migration source cannot log in.

Steps to Reproduce:
- Install Mac OS X 10.6 on a computer and apply all available updates.
- Start the Mac OS X 10.6 computer in Target Disk Mode
- Install macOS 10.13.0 Supplemental on a computer
- Start the macOS 10.13.0 computer
- Step through the Setup Assistant until the Migration Assistant is reached
- Attach the Mac OS X 10.6 computer to the macOS 10.13 computer
- Migrate everything from the Mac OS X 10.6 computer
- Allow the migration to complete and the macOS 10.13 computer to restart
- Attempt to log in as the migrated user

Expected Results:
- The migrated user can log in

Actual Results:
- The migrated user cannot log in

It appears the Mac OS X 10.6.8-provided SHA1 hash is no longer acceptable/importable to the now-absolutely-required-as-of-High Sierra salted SHA512 PBKDF2 password hash.

Version/Build:
- Mac OS X 10.6.8 10K549, MacBookPro8,1
- macOS 10.13.0 Supplemental Update 17A405, iMac9,1

Configuration:
"resetpassword" from Recovery is capable of (re)setting the password properly.  Beyond that if the original password is set with "resetpassword" that the automatic login (saved at /etc/kcpassword) is successful.

I've attached a copy of the dslocal user record as it was copied by Migration Assistant to the macOS 10.13.0 Supplemental Update computer.